feat(EmailMessage): change EmailMessage parameter to pointer in Email…

…Sender interface for efficiency.

docs/AWS_SES_Credentials.md

@@ -44,7 +44,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage(sender,[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage(sender,[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").
 		AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,

docs/Gmail_Credentials_API_Key.md

@@ -43,7 +43,7 @@ if err != nil {
 }
 
 // Define email message using an alias email address
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Gmail_Credentials_JWT.md

@@ -83,7 +83,7 @@ if err != nil {
 }
 
 // Define email message using an alias email address
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Gmail_Credentials_OAuth2.md

@@ -143,7 +143,7 @@ if err != nil {
 }
 
 // Define email message using an alias email address
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Gmail_Credentials_ServiceAccount copy.md

@@ -84,7 +84,7 @@ if err != nil {
 }
 
 // Define email message using an alias email address
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Gmail_Credentials_ServiceAccount.md

@@ -77,7 +77,7 @@ if err != nil {
 }
 
 // Define email message using an alias email address
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Mailgun_Credentials.md

@@ -41,7 +41,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Mandrill_Credentials.md

@@ -37,7 +37,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Microsoft365_Credentials_ROPC.md

@@ -51,7 +51,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Microsoft365_Credentials_app.md

@@ -51,7 +51,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Microsoft365_Credentials_credentials.md

@@ -50,7 +50,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Microsoft365_Credentials_managed_id.md

@@ -38,7 +38,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Microsoft365_Credentials_user.md

@@ -51,7 +51,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/Postmark_Credentials.md

@@ -39,7 +39,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/SMTP_Credentials.md

@@ -44,7 +44,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

docs/SendGrid_Credentials.md

@@ -36,7 +36,7 @@ if err != nil {
 }
 
 // Define email message
-message := *gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
+message := gomail.NewEmailMessage("[email protected]",[]string{"[email protected]"}, "Test Email with attachment", "This is the plain text part of the email.").
 		SetHTML("<p>This is the <b>HTML</b> part of the <i>email</i>.</p>").AddAttachments(gomail.Attachment{
 			Filename: "attachment.jpg",  Content: attachmentContent,
 		})

email_sender.go

@@ -69,10 +69,10 @@ const DefaultMaxAttachmentSize = 25 * 1024 * 1024 // 25 MB
 type EmailSender interface {
 	// SendEmail sends an email with the given message.
 	// Parameters:
-	// - message: An EmailMessage struct containing the details of the email to be sent.
+	// - message: A pointer to an EmailMessage struct containing the details of the email to be sent.
 	// Returns:
 	// - error: An error if sending the email fails, otherwise nil.
-	SendEmail(message EmailMessage) error
+	SendEmail(message *EmailMessage) error
 }
 
 // EmailMessage contains the fields for sending an email.

providers/gmail/gmail_email_sender.go

@@ -47,7 +47,7 @@ func (ms *gmailMessageSenderWrapper) send(message *gmail.Message) (*gmail.Messag
 //
 // Returns:
 //   - error: An error if sending the email fails.
-func (s *gmailMessageSenderWrapper) SendEmail(message gomail.EmailMessage) error {
+func (s *gmailMessageSenderWrapper) SendEmail(message *gomail.EmailMessage) error {
 	mimeMessage, err := providers.BuildMimeMessage(message)
 	if err != nil {
 		return fmt.Errorf("unable to build MIME message: %w", err)

providers/gmail/gmail_email_sender_test.go

@@ -22,6 +22,11 @@ type MockTokenManager struct {
 	err   error
 }
 
+// TestEmailSenderImplementation checks if gmailMessageSenderWrapper implements the EmailSender interface
+func TestEmailSenderImplementation(t *testing.T) {
+	var _ gomail.EmailSender = (*gmailMessageSenderWrapper)(nil)
+}
+
 func (m *MockTokenManager) GetToken() ([]byte, error) {
 	return m.token, m.err
 }
@@ -100,15 +105,15 @@ func (m *mockInvalidTokenManager) GetToken() ([]byte, error) {
 func TestSendEmailWithMockService(t *testing.T) {
 	emailSender := buildMockGmailMessageSenderWrapper(nil)
 
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
 
 	err := emailSender.SendEmail(message)
 	assert.NoError(t, err)
 }
 
 func TestSendEmailWithSendMessageError(t *testing.T) {
 	emailSender := buildMockGmailMessageSenderWrapper(errors.New("send message error"))
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
 
 	err := emailSender.SendEmail(message)
 	assert.Error(t, err)
@@ -117,7 +122,7 @@ func TestSendEmailWithSendMessageError(t *testing.T) {
 func TestSendEmailWithMockServiceError(t *testing.T) {
 	emailSender := buildMockGmailMessageSenderWrapper(errors.New("mock service error"))
 
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
 
 	err := emailSender.SendEmail(message)
 	assert.Error(t, err)
@@ -126,7 +131,7 @@ func TestSendEmailWithMockServiceError(t *testing.T) {
 func TestSendEmailWithBCC(t *testing.T) {
 	emailSender := buildMockGmailMessageSenderWrapper(nil)
 
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
 		SetBCC([]string{"[email protected]"})
 
 	err := emailSender.SendEmail(message)
@@ -317,7 +322,7 @@ func TestNewGmailEmailSenderJWTAccessInvalidJson(t *testing.T) {
 func TestSendEmailWithNilGmailService(t *testing.T) {
 	emailSender := &gmailMessageSenderWrapper{}
 
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
 
 	err := emailSender.SendEmail(message)
 	assert.Error(t, err)

providers/helper_functions.go

@@ -14,15 +14,15 @@ import (
 // HTML content, and multiple attachments.
 //
 // Parameters:
-// - message: An EmailMessage struct containing the details of the email to be sent.
+// - message: A pointer to an EmailMessage struct containing the details of the email to be sent.
 //
 // Returns:
 // - []byte: A byte slice containing the complete MIME message.
 // - error: An error if constructing the MIME message fails, otherwise nil.
 //
 // Example:
 //
-//	message := *gomail.NewEmailMessage(
+//	message := gomail.NewEmailMessage(
 //		"[email protected]",
 //		[]string["[email protected]"],
 //		"Test Email",
@@ -36,7 +36,7 @@ import (
 //	    log.Fatalf("Failed to build MIME message: %v", err)
 //	}
 //	fmt.Println(string(mimeMessage))
-func BuildMimeMessage(message gomail.EmailMessage) ([]byte, error) {
+func BuildMimeMessage(message *gomail.EmailMessage) ([]byte, error) {
 	var msg bytes.Buffer
 
 	// Determine boundaries

providers/helper_functions_test.go

@@ -11,19 +11,19 @@ import (
 
 func TestBuildMimeMessage(t *testing.T) {
 	tests := []struct {
-		message  gomail.EmailMessage
+		message  *gomail.EmailMessage
 		contains []string
 	}{
 		{
-			*gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email."),
+			gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email."),
 			[]string{"From: [email protected]", "To: [email protected]", "Subject: Test Email", "This is a test email."},
 		},
 		{
-			*gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "<p>This is a test email.</p>"),
+			gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "<p>This is a test email.</p>"),
 			[]string{"From: [email protected]", "To: [email protected]", "Subject: Test Email", "Content-Type: text/html", "<p>This is a test email.</p>"},
 		},
 		{
-			*gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
+			gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
 				SetCC([]string{"[email protected]"}).
 				SetBCC([]string{"[email protected]"}).
 				SetAttachments([]gomail.Attachment{
@@ -32,7 +32,7 @@ func TestBuildMimeMessage(t *testing.T) {
 			[]string{"From: [email protected]", "To: [email protected]", "Cc: [email protected]", "Subject: Test Email", "This is a test email.", "Content-Disposition: attachment; filename=\"test.txt\"", base64.StdEncoding.EncodeToString([]byte("This is a test attachment."))},
 		},
 		{
-			*gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
+			gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
 				SetCC([]string{"[email protected]"}).
 				SetBCC([]string{"[email protected]"}).
 				SetReplyTo("[email protected]"),

providers/mailgun/mailgun_email_sender.go

@@ -42,11 +42,11 @@ func NewMailgunEmailSender(domain, apiKey string) (*mailgunEmailSender, error) {
 // It constructs the email message from the given EmailMessage and sends it using the Mailgun API.
 //
 // Parameters:
-//   - message: An EmailMessage struct that contains the details of the email to be sent, including the sender, recipients, subject, body content, and any attachments.
+//   - message: A pointer to an EmailMessage struct that contains the details of the email to be sent, including the sender, recipients, subject, body content, and any attachments.
 //
 // Returns:
 //   - error: An error if the email sending fails, otherwise nil.
-func (s *mailgunEmailSender) SendEmail(message gomail.EmailMessage) error {
+func (s *mailgunEmailSender) SendEmail(message *gomail.EmailMessage) error {
 	mg := s.mailgunClient
 
 	mGMessage := mg.NewMessage(

providers/mailgun/mailgun_email_sender_test.go

@@ -10,6 +10,11 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+// TestEmailSenderImplementation checks if mailgunEmailSender implements the EmailSender interface
+func TestEmailSenderImplementation(t *testing.T) {
+	var _ gomail.EmailSender = (*mailgunEmailSender)(nil)
+}
+
 // Mock implementations for Mailgun
 type mockMailgun struct{}
 
@@ -45,7 +50,7 @@ func TestMailgunEmailSender_SendEmail(t *testing.T) {
 		mailgunClient: &mockMailgun{},
 	}
 
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.").
 		SetCC([]string{"[email protected]"}).
 		SetBCC([]string{"[email protected]"}).
 		SetReplyTo("[email protected]").
@@ -65,7 +70,7 @@ func TestMailgunEmailSender_SendEmailWithSendError(t *testing.T) {
 		mailgunClient: &mockMailgunWithError{},
 	}
 
-	message := *gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
+	message := gomail.NewEmailMessage("[email protected]", []string{"[email protected]"}, "Test Email", "This is a test email.")
 
 	err := emailSender.SendEmail(message)
 	assert.Error(t, err)
@@ -77,7 +82,7 @@ func TestMailgunEmailSender_SendEmailWithEmptyFields(t *testing.T) {
 		mailgunClient: &mockMailgun{},
 	}
 
-	message := *gomail.NewEmailMessage(
+	message := gomail.NewEmailMessage(
 		"[email protected]",
 		[]string{},
 		"",

providers/mandrill/mandrill_email_sender.go

@@ -43,11 +43,11 @@ func NewMandrillEmailSender(apiKey string) (*mandrillEmailSender, error) {
 // It constructs the email message from the given EmailMessage and sends it using the Mandrill API.
 //
 // Parameters:
-//   - message: An EmailMessage struct that contains the details of the email to be sent, including the sender, recipients, subject, body content, and any attachments.
+//   - message: A pointer to an EmailMessage struct that contains the details of the email to be sent, including the sender, recipients, subject, body content, and any attachments.
 //
 // Returns:
 //   - error: An error if the email sending fails, otherwise nil.
-func (s *mandrillEmailSender) SendEmail(message gomail.EmailMessage) error {
+func (s *mandrillEmailSender) SendEmail(message *gomail.EmailMessage) error {
 	maMessage := mandrillMessage{
 		FromEmail: message.GetFrom(),
 		To:        make([]mandrillRecipient, 0),